![]() ![]() Status Flatten(const Matrix* matrix, REAL flatness) - allows you to provide an optional transformation matrix and turn curves into a collection of points.Some of the methods of GraphicsPath include: Obviously, some of them require only two ( AddLine), or have more specific data requirements ( AddString, AddCurve, etc.) We will be using AddLine in Doodle, but I hope you can see the possibilities as we discuss some of the things a GraphicsPath can do. Typically, a lot of these functions have four overloads, that take a rect built of REALs or INTs, or the corresponding points in either REAL or INT form. The HatchBrush constructor looks like this: GDI+ offers 52, as follows:Ī menu option to change the hatch style would be a very easy thing to add to the program, and would allow you to explore some of the great new styles. ![]() These have come a long way from GDI, which offered six hatch values. In our OnEraseBackground function, we select a HatchBrush and use it to draw the SDI area not covered by the bitmap. Let's quickly talk about what I am going to cover in this article.įirst of all, let's talk hatch brushes. There, got that out of your system? It's just the tip of what we can do, I promise you. You can load existing images or create one of a different size by clicking Load or New respectively. The second colour value option is for the gradient fill - the fill works from the edges to the centre. Click on View/Pen Options to choose what tool you are using, and choose the colour/alpha value. Go ahead - when Doodle starts, it will present you with a default canvass of 350 x 350 pixels. I suppose if you're like me, you'll start by downloading the executable and playing with it to see if it does stuff you want to learn. You'll find it won't take much to create something easily as good as the Paint package that comes with Windows. I will assume you are familiar with concepts presented in my first two articles, and I suggest for homework you refer to them and implement some of the tools covered in my GDI Brushes and Matrices article to Doodle. The subject of this article is a simple paint program, which allows you to load and save images, as well as create new ones, and draw on them free hand, creating lines/filled shapes and gradient filled shapes, and also a soft brush (a brush which is solid in the centre and has progressively more transparency towards its edge.) I have been working on a paint program for 18 months now, and I am amazed at how much stuff I had to learn the hard way which is now just a piece of cake, because GDI+ does the work for you. In this article, I hope to show you some of the really amazing stuff that GDI+ can do. ![]()
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